diff --git a/apps/server/spec/setup.ts b/apps/server/spec/setup.ts
index c3b32e477..2fae6e73c 100644
--- a/apps/server/spec/setup.ts
+++ b/apps/server/spec/setup.ts
@@ -1,6 +1,7 @@
 import { beforeAll } from "vitest";
 import i18next from "i18next";
 import { join } from "path";
+import dayjs from "dayjs";
 
 beforeAll(async () => {
     // Initialize the translations manually to avoid any side effects.
@@ -15,4 +16,8 @@ beforeAll(async () => {
             loadPath: join(__dirname, "../src/assets/translations/{{lng}}/{{ns}}.json")
         }
     });
+
+    // Initialize dayjs
+    await import("dayjs/locale/en.js");
+    dayjs.locale("en");
 });
diff --git a/apps/server/src/services/i18n.ts b/apps/server/src/services/i18n.ts
index 7630fbad4..8e033bbf4 100644
--- a/apps/server/src/services/i18n.ts
+++ b/apps/server/src/services/i18n.ts
@@ -36,11 +36,11 @@ export async function initializeTranslations() {
     } catch (err) {
         console.warn(`Could not load locale ${dayjsLocale}`, err);
     }
+    dayjs.locale(dayjsLocale);
 }
 
 export function ordinal(date: Dayjs) {
     return dayjs(date)
-        .locale(dayjsLocale)
         .format("Do");
 }